What keeps the visceral pleura in close proximity to the parietal pleura?
A) the mesothelia are one and the same B) spider web -like processes extending from the outer covering C) surface tension of the intrapleural fluid D) positive pressure in the intrapleural space E) trans -alveolar pressure
Why are alveoli arranged in small grape -like clusters?
A) increase chest volume and elasticity (resilience) B) increase tidal volume C) maximize surface area and minimize thickness D) maximize density and volume E) maximize surface area